Replacement laptop battery off ebay
No doubt others will be along to say it’ll be fine, but…
A laptop battery is something I’d only get from the manufacturer. Aside from the risks of getting a lower than advertised capacity, it’s the risk of fire/explosion that bothers me more.
Wh is a better measure of capacity, mAh is only relevant if you’re comparing like-for-like voltage wise. Wh is the normal measure for laptops.Posted 4 years agomrmonkfingerMember
Pot luck, I think. Lots of fakes in the battery world on Ebay.
My last punt for our aging laptop (hence just wanting a cheapie to make it work) turned out ok and is still going strong 3 years later.
mAh is only relevant if you’re comparing like-for-like voltage wise.
i.e. 100% relevant if you’re replacing a battery with another of the same voltage, as you would in a laptop.Posted 4 years ago
Not sure i’d be bothered with getting this one rebuilt, dont use the laptop much really. Normally leave it plugged in when using but iv’e just got the interface to read fault codes from my car so a decent battery would make that a lot easier.
I’ll just go for the one with the best feedback then!Posted 4 years agothisisnotaspoonMember
Got one for the missus laptop, and a charger.
Neither has exploded or caught fire.
Battery lasts as long as it should, although it’s hardly used anymore, but works OK when it is.
Both were considerably lighter than the originals though, presubably they skimped on heat sinking as it’s not short on current or capacity.
The connector is a bit duff, it doesn’t click into the laptop, or even have a tight fit just sits in the socket and falls out occasionaly.Posted 4 years agocranberryMember
When it comes to replacement laptop batteries not all the cheap ones are nasty and not all the nasty ones are cheap, but seem to be a lot of bad batteries out there.
I’d want to buy a battery from a proper reseller with good feedback, not just someone with an Ebay account and a spare bedroom full of Trotters Independent Traders finest.Posted 4 years agoHoratioHufnagelMember
I got a cheap ebay one for 30 quid ish for a Dell. Initially it was great, held its charge fine, lasted the expected time. But it rapidly lost its ability to hold a charge and after 6 months didn’t hold any charge at all 🙁
I used this to monitor it…
Previous Dell battery lasted around 3 years or so.
Not sure how you find a good one. do any non-eBay ones come with a guarantee?Posted 4 years ago
I’ve recently got one from fleaby, it was the cheapest I could find (£12ish) with decent seller seller feed back and it works fine. I’ve killed 2 laptop batteries by leaving it plugged in 24:7 so I’m trying to be a bit nicer to this one and not have it at 100% charge all the timePosted 4 years ago
I was reading those links and thinking ‘I still don’t think you have’ and then I found this in the first link:
“Should I disconnect my laptop from the power grid when not in use?” many ask. Under normal circumstances this should not be necessary because once the lithium-ion battery is full the charger discontinues charge and only engages when the battery voltage drops. Most users do not remove the AC power and I like to believe that this practice is safe.
So now I really don’t think you have 🙂
Overcharging is not good for LiIon batteries, for sure, but your laptop is not always charging the battery when the power supply is plugged in. It’s clever enough to realise that the battery is full and stop charging, and then apply the required top ups when needed.
You only need worry if your battery is getting hot. Mine isn’t.Posted 4 years ago
I’m still right 😉
“Commercial chargers do not allow changing the charge voltage limit. Adding this feature would have advantages, especially for laptops as a means to prolong battery life. When running on extended AC mode, the user could select the “long life” mode and the battery would charge to 4.00V/cell for a standby capacity of about 70 percent. Before traveling, the user would apply the “full charge mode” to bring the charge to 100%. Some laptop manufacturers may offer this feature but often only computer geeks discover them.”
“Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage. A battery dwelling above 30°C (86°F) is considered elevated temperature and for most Li-ion, a voltage above 4.10V/cell is deemed as high voltage. Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling.”
It was over the space of about a year but a laptop battery permanently at 100% charge and sitting in a hot laptop or 20C living room will become knackered much quicker than if it is kept at a lower state of charge and as cool as possible. Overcharging kills them very quick but that’s a different issue.Posted 4 years ago
You are right in that there are some things you could do to extend the life. However your original comment suggested that you should be unplugging your charger once the battery’s full, which means a) faff and b) running it on battery all the time, only pausing to charge it up. Which will kill your battery much more quickly.
The best advice is if you are using it on AC all the time remove the battery.Posted 4 years ago
It may have failed even if you hadn’t plugged it in though – that’s what you don’t know.
Also buying a ‘Dell’ battery from ebay you have no idea if it’s really a Dell one, or it’s a ‘reclaimed’ one or it’s a new case filled with reclaimed cells.
Cells do randomly fail.Posted 4 years ago
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